Drilling machine



Feb. 28, 1928.

F. W. DINE DRILLING MACHINE Filed June 28, 1923 2 Sheets Sheet 2 m T 9 T: l .1 L

m Q Q n 6 INVENTOR /WAM 11.; ATTORNEY Patented Feb. 28, 1928.

UNITED srnrss F i-m" orr cs.

QERANK W. DINE, OF MINSTER, OHIO, ASSIGNOB, MESNE ASSIGNMENTS, TO THE- NATIONAL' AUTOMATIC TOOL COMPANY, OF RICHMOHD, INDIANA, A 'GORPORA.

TLTON OF INDIANA.

Application filed June 28,

This invention relates to new and-useful improvements in drilling machines, and has particular reference to a drilling machine 1n which the driving connection between the train of gearing and the spindle is in close proximity to the work.

It is one of the p'ri cipal objects of my inveution to provide in a drilling machine, means for so mounting the back-gear shaft and spindle gears that one will be on the tool-carrying end of the spindle and the other on a parallel shaft, in order that the driving connection between them may be 1n proximity to the work 7 v upper end of the spindle. This eliminates the torque or twist to which the spindle is subjected when it driven from its upper end, and places the back-gear shaft and spindle gears in a position in front of the machine where they may be readily inserted and removed. Furthermore, such a construction, allows the spindle a-much greater travel than it has in other drilling machines where a high driving connection limits the descent of the thrust bearing. 7 I

Other important and incidental objects will be brought out in the followingspecification, and particularly set forth In the subjoined claims. e

In the accompanying drawings, Figure 1 is a perspective view of my improved drilling machine. Figure '2 is a longitudinal sectional view taken through the head of the machine. And Figure 3 is a cross sectional view taken on the line 3-3 of Figure '2, showing the reverse gears, i

Throughout the specification and drawings, similar reference characters denote corresponding parts.

Referring to the accompanying drawings for a detailed description of the form of embodiment of my invention illustrated therein, the numeral 1 designates a drilling machine housing having a front bearing portion 2 for a spindle 3. The latter is driven from a power-driven pulley shaft 4 through a train of gearing and suitable shafting now to be described.

Referring to Figure 2, the pulley shaft 4: drives, through miter gears 5, 5, a shaft 6 on which there is keyed a clutch driving member 7. Surrounding the latter is a clutch driven member 8 to which. there is shaft in one direction.

rather than at the a j ect.

DRILLING; MACHINE.

1923 Serial No. 648,234.

secured a gear 9 that is put in motion when the clutch is engaged. I

v Mounted on a second shaft 10 is a gear 11' which is engaged by the gear 9 to rotate the the other direction by a reversing clutch now to be described.

On the lower end of the shaft6 there is mounted a gear 12 which is in engagement with an intermediate gear 13 that meshes with a gear 1 1 on the lower end ofthe shaft 10. (See Figures 2' and 3.) Therefore, by means of the gears 12, 13 and it it is p08- sible, when desired, to cause the shaft '6 to drive'the shaft 10 in a reverse direction. There is also mounted on the shaft '10 a sliding gear 15 which engages a gear 16 keyed to the back gearshaft 17 to give the machine two mechanical speed changes.

The spindle bearing portion 2 of the housing, which is in the upper front part of the machine,'terminates at its lower endin a skirt or flange portion 18 through which the back gear shaft 17 and the spindle 3 pro-' See FigureQ'.) Removably' bolted to theflange portion 18 of said bearing portion, is a flanged or cup-shaped oil-holding member or cover 19; I

v Secured by a cap screw 20 or other suitable means to the lower end of the back gear shaft 17, is a gear '21 which meshes with a gear 22. The latter is preferably secured by cap screws 23' to a spindle-driving sleeve 24 that is rotatable iina bushing 25 secured in It is rotated in the bearing portion '2 of the housing.

Pinned in the sleeve 24: are keys 26 which enter longitudinal groovesi2'7 in the periphcry of the spindle 3 for thepurpo'se of driving the latter.

The gears 21andfi22' are mounted on the shaft 17 and sleeve '24 respectively to rotate within the flanged cover 19, which not only contains, oil for the lubrication of these gears, but it may be readily taken off to permit the replacement of them with ease. Furthermore, the location of these gears at the bottom of the spindle bearing portion 2 i of the housing, provides a drivin connection between the back gear shaft 1% and the spindle 3 that is in close proximity to the work, thus eliminating the torque or twist to from its upper. end.

The mounting of the gears 21 and 22% the bottom of the bearing portion 2 of the housing, makes it possible to increase the travel of the spindle, for the bore 28 in the sleeve 24; may be made large enough to re ceive the ball thrust-bearing 29 at the upbetween the top of the sleeve and the tops of the keys 26 therein. It is thus seen that the ball thrust-hearing 29 maybe carried into the sleeve by the spindle; to lengthen itsdescent. i

Having describedmyinvention, I claim: 1. A machine tool combinlng a spindle head rovidin 'a main housin a sleeve b ournaled in a Wall 0t said housing and havmg an end projecting therethrough and adapted to have a driven pinion detachably mounted thereon; a feed drive gear secured upon the other end of the sleeve; an adjacent power-driven shaft also journaled in said Wall and having its end projecting therethrough and adapted to have a driving pinion'detachably secured thereto; a driven and a driving pinion demountablyattached to said spindle and shaft respectively; an auxiliary casingenclosing said pinions and detachably secured to said main housing to permit its removal for the purpose of changing said pinions; a spindle translatahly passing through said auxiliary casing and through the bore of said sleeve and splined thereto tobe driverithereby; and means for translating said spindle.

2 A machine tool combining a drill-head providing a main housing; a sleeve journaled in a wall of said housing and proecting internall and externally thereof; a feed ng gear Wit nn saidhousing and mounted on the internal end of said sleeve; a sleeve driving pinion located external of sald housing and detachablysecured to thee ternal end of said sleeve; a driving shaft journaled in the Wall of said housing; an

- external pinion detachahly secured to the outer end oil. said driving shaft'and meshing With said pinion to impart rotation thereto; and a spindle projecting through the bore of said sleeve and translatably splined thereto. a 3. A machine tool combining a spindle head providing a main housing; a' sleeve 'ournaled in a Wall of saidhousing and having an end projecting therethrough and adapted to havea sleeve-driving pinion detachably mounted thereon; an adjacent power-driven shaft 1 also journaled in said wall and havingits end projecting therethrough and adapted tohave a driving pin-v ion detachablysecured thereto; a pair of pinions demountably attached external of said housing to said spindle and shaft re spectively; an auxiliary casing in the nature jecting internally and externally thereof;

a gear Within said housing and mounted on the internal end of said sleeve; a gear-train deriving motion from said gear and located \vithinsaid main-housing; a pinion located external of said housing and detachably secured to theiexternal end of said sleeve; a

driving Shit'fllJOLlIl'litlGCl n the Wall of sald.

housing; apinion located external of said housing and detachably secured to the outer end of said driving shaft and meshing With saidfirst pinion to impart rotation'thereto; a spindle projecting through the bore of said 7 sleeve and translatably splined directly to said sleeve, vherebythe driving torque will be applied tossaid spindle at its point of emergence through tl'lG WLll of said housing; and a shallow casing for said pinions detachably secured to the external face of said Wall a h In testimony whereof I havc hereunto set my hand this 25th day of June, 1923. j

FRANK W. mun. 

